Document
Ordering number : EN4799B
CMOS IC
LC7538JM
Electronic Volume Control System for Car Audio
Overview
The LC7538JM is a fully equipped electronic volume IC which permits significant reductions in externally connected components while providing ample volume, balance, loudness, fader, bass and treble control functions.
• On-chip op amplifier for caching applications reduces external components.
• Reduced switching noise with silicon gate CMOS processor.
• All controls performed using serial data input (CCB).
Features
• Volume
: 81 positions ranging from 0 dB to -79 dB (in 1 dB increments) plus -∞. Separate left and right control provides
excellent balance function.
• Loudness
: Loudness operation provided by externally attached CR to activate tap at the -20 dB position of the volume ladder resistor.
• Fader
: Fader function traversing 16 positions with rear or front attenuated output only (these 16 positions consist of 2 dB step intervals ranging from 0 dB to -20 dB, 5 dB step intervals ranging from -20 dB to -45 dB, plus the end settings of -60 dB and -∞).
• Bass and Treble: Using externally attached C (capacitor), the LC7538JM provides bass-treble mutual 15-position control and formats a NF-form tone control circuit (LUX form).
Package Dimensions
unit : mm 3204-MFP36S
[LC7538JM]
SANYO: MFP36S
Specifications
Absolute Maximum Ratings at Ta = 25°C, VSS = 0 V
Parameter Maximum supply voltage
Maximum input voltage
Allowable power dissipation Operating temperature Storage temperature
Symbol VDD max VIN max1
VIN max2
Pd max Topr Tstg
Conditions
VDD CL, DI, CE
LTIN, RTIN, L5dBIN, R5dBIN, L1dBIN, R1dBIN, LFIN, RFIN Ta ≤ 85°C
Ratings 11
VSS – 0.3 to VDD + 0.3
VSS – 0.3 to VDD + 0.3
210 –40 to +85 –50 to +125
Unit V V
V
mW °C °C
Any and all SANYO products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircraft’s control systems, or other applications whose failure can be reasonably expected to result in serious physical and/or material damage. Consult with your SANYO representative nearest you before using any SANYO products described or contained herein in such applications.
SANYO assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all SANYO products described or contained herein.
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LC7538JM
Allowable Operation Conditions at Ta = 25°C, VSS = 0 V
Parameter
Symbol
Conditions
min
Supply voltage Input high level voltage Input low level voltage
Input amplitude voltage
VDD
*1
VIH CL, DI, CE
VIL CL, DI, CE
LTIN, RTIN, L5dBIN, R5d.